> Isn't the point she's making that she didn't fit the culture primarily because of her gender?

It is, but the point a lot of people are making here is that maybe she sees the situation in a wrong way, as her perspective is a reflection of her gender, so she cannot really judge if the problems happened primarily because of her gender. Actually, the fact that the other female employees felt secure and relaxed enough that they were hola-hooping in the office suggests otherwise.

> A workplace just filled with happy young male developers is not necessarily a healthy environment, or one that necessarily has a good culture.

It's also not necessarily an unhealthy/toxic environment.